Stainless Woven Mesh Terminology

Pitch- The distance between the middle point of two adjacent wires or the sum of the aperture width and the wire diameter.

% Open Area- The ratio of the area of the aperture to the area of the mesh expressed in percentage terms

Weft- All wires running across the cloth as woven

Stainless Woven Mesh Formulas

Aperture

Calculating the aperture

Count of a convenient number of apertures (N)

Measure the length covered by the N apertures (L)

Measure the wire diameter (D)

The average aperture (A)

Working example of calculating the aperture of 6/20 woven wire mesh

Number of apertures counted N = 6

Length covered by apertures centre to centre L = 25.4mm

Diameter of wire D = 0.9mm

Aperture

The woven wire is identified as 3.33mm aperture / 0.9mm diameter

Mesh Count

Percentage Open Area

The mesh has a 62% open area

Micron Conversion

Micron (micrometer) is a unit of measure, in which usually only fine mesh under 1mm is referred to. A micron us a thousandth of a millimetre.

In this example 325/48.5, 0.043mm aperture, 0.035mm diameter is used.

Plain Weave

The most common and simplest weaves.Each warp wire (wire running parallel to the length of the cloth) passes alternatively over and under the wires running transversly through the cloth at 90 degree angles.

Intercrimp Weave

Has extra crimps in warp and weft wires between intersections.

Lock Crimp Weave

Is produced with pre-crimped wire. Lock crimp weave is stabilised by a notch or bump at the wire intersections.

Twill Weave

Is Produced by passing each fill wire alternatively over and under two warp wires.